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- OS 23 1850-1945 Ordnance Survey: Boundaries Branch: Parish Name Books Details
- OS 24 1820-1971 Ordnance Survey: Boundaries Branch: Poor Law Union Files Details
- OS 26 1850-1892 Ordnance Survey: Boundaries Branch: Boundary Remark Books Details
- OS 27 1843-1895 Ordnance Survey: Boundaries Branch: Boundary Sketch Maps Details
- OS 28 1845-1869 Ordnance Survey: Boundaries Branch: Field Sketch Maps Details
- OS 29 1845-1892 Ordnance Survey: Boundaries Branch: Journals of Inspection Details
- OS 30 1843-1970 Ordnance Survey: Boundaries Branch: Scottish Boundaries Correspondence Details
- OS 31 1865-1947 Ordnance Survey: Boundaries Branch: Boundary Record Maps (New Sketch Maps) Details
- OS 32 1939-1957 Ordnance Survey: Boundaries Branch: Boundary Reports Details
- OS 33 1941-1971 Ordnance Survey: Boundaries Branch: Six-Inch and 1:2,500 Revised Boundary Maps Details
- OS 37 1915-1975 Ordnance Survey: Boundaries Branch: County Files: Series I Details
- OS 38 1870-2004 Ordnance Survey: Boundaries Branch: Deposited Maps (DM and DMX Series) Details
- OS 39 1883-1993 Ordnance Survey: Boundaries Branch: Scottish Deposited Maps (DMS Series) Details
- OS 40 1890-1973 Ordnance Survey: Boundaries Branch: Boundary Record Sheets: County Series (Quarter Sheets) Details
- OS 41 1879-1958 Ordnance Survey: Boundaries Branch: Boundary Record Sheets: County Series (Full Sheets) Details
- OS 42 1921-2004 Ordnance Survey: Boundaries Branch: Boundary Record Sheets: Six-Inch and 1:10,000 National Grid Details
- OS 53 1861; 1894; 1955-2001 Ordnance Survey: Boundaries Branch: County Files: Series II Details
- OS 76 1899-2010 Ordnance Survey: Administrative Area Diagrams Archive, Record Maps Details
- OS 77 1391; 1700; 1798; 1844-2006 Ordnance Survey: Boundaries Branch: Field Files and County Files: Series II Details
- OS 79 1905-2000 Ordnance Survey: Boundaries Branch: Boundary Perambulation Cards Details

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